Exploring drill



May 5, 1925. 1,536,600

o. B. ANDERSON EXPLORING DRILL Filed Oct. 23. 19'22 2 Sheets-Sheet 1 @i l i f6 A ff l il? al Ji ./zz J" 42:5 y y l] zz 2z j? I lu? 'a f4 yl 6 @I r m May 5, 1925. 1,536,600

o. B. ANDERSON EXPLORING DRILL Filed Oct. 23, 1922 2 Sheets-Sheet 2 @aj/ef, 22M/W Patented May 5, 41925.. t

UNITED STATES OLOF B. ANDERSON, OF MARQUETSE, HICHIGAN.

nxPLonING DRILL.

Application filed October 23, 1922. Serial No. SSQAQI,

To all whom it 4may concern:

Be it known that I, OLOF B. ANDERSON, a citizen of the United States, residing at Marquette, in the county of Marquette and State of Michigan, have invented a certain new and useful Improvement in Exploring Drills, of which the following is a full, clear, concise, and exact description, reference being yhad'to the 'accompanying drawings, forming a part of this specification.

My invention relates to exploring drills, and more particularly-to a combination core barrel and fish-tail bit for oil Well drillinr.

It is a purpose of the-invention to provi e a rotary drill for the purpose of determining the structure of the ground through which a hole is being bored, which comprises ,a core receiving member or barrel, and to provide means for maintaining the core in Substantially its original state. In ordinary devices of the general nature outlined above it has been found that the mud laden fluid which is pumped into the hole that is being bored tends to seal up the wall of the hole and to mix with the material which is being drilled out, that is to form the core, so that the core -does not accurately indicate the structure of the `material through which the hole is being bored, thus the driller may not know that he has passed through oil, due to the fact that the core does not properly indicate this, and due to the fact that the mud vin the hole that is being bored has sealed up the walls of the opening so as to prevent the passage of the oil sands into the core receiving Ibarrel.

It is a further purpose of the invention to provide a drill which comprises a bit portion for drilling out the core and a fish-tail bit for enlarging the bore so as to provide the proper size bore for the passing ofthe drill stem, and parts attached thereto, therethrough, and Eto provide a passage between said fish-tail bit and said core drilling bit for the mud laden fluidI so that the mud laden fluid passes downwardly in said assages and then upwardly lalong the rill stem thus sealing up the Wall of the hole thereby but does not mix with the core, and as a result the core that is received in the core barrel or core receiving member is substantially of the structure of the ground through which the same is passing.

It is a further purpose of the invention to provide a new and improved core lifting device, or an exploring drill of this character.

Other objects and advantages of the invention willappear as the description of the accompanying drawings proceeds. `However, 1 desire to have.v it distinctly understood that. I do not intend to limit myself to the exmt details shown or described, but

vthat I intend to include as part of my 1nvention all such obvious changes and modifications of parts as would occur to a person skilled in this art and as would fall within" the scope of the claims.

In the drawings:

Fig. 1 is a view partly in side elevation and 'partly in longitudinal section of my improved drill showing the same 0n the drill stem, a portion thereof being broken away; Fig. 2 is a section taken on the line 2-2 of Fig. 1;

Fig. 3 is a section taken on the line 3 3 of Fig. 1;

Fig. 4 is a section taken on the line 4-4 of Fig. 1;

Fig. 5 is 'an enlarged view similar to Fig.

1 showing the improved core lifter.

Fig. 6 is a sectional View of the core lifter with the parts in a different position than in Fig. 5; and

Fig. 7 is a section taken on the line 7-7 of Fig. 6.

Re erring in detail to the drawings, a drill stem having the scrcwthreaded end portion 10' isl provided with a coupling member 11, which is screwthreaded thereon, into which the coupling member 1 2 is screwthreadedly secured, said coupling member 12 connecting the couplin 11 with the screwthreaded casing 13, sai casing 13 having screwthreadedly secured to the lower end thereof the bit 14, said bit 14 bein what is known as a fish-tail bit having the lades 15 thereon, which are formed as shown in Figs. 1 and 4. The coupling member 12 is made in the form of a plug provided with a plurality o openings 16 extending lengthwise therethrough, said openings 16 communicating with the opening 17 in the member 11 which communicates with the usual opening in the drill stem 10. The member 12 is also provided with a central openin 18 which terminates short of the upper end of said coupling members said coupling member being made solidas indicated at 19 beyond the end of said opening 18. The opening 18 is screwthreaded as indicated at 19 to receive the screwthreaded end portion gli of the pipe 20, which is secured to the head member 21 provided on the core barrel 22.

Screwthreadedly secured to the lower end of the member 22 is a coupling 23 for connecting the same with the connection 24 having the lutings or ribs 25 thereon. The member 24 also serves as a bit carrying member, the bit 26 being screwthreadedly mounted onthe lower end thereof, and having the teeth 27 thereon.

The innerl wall portion of the bit 26 is beveled as indicated at 28 so as to gradually increase in diameter away from the teeth 27, and has the beveled edged core lifting member 29 mounted therein'ysaid member 29 being provided with a beveled `edge por.

. head 21.

tion 30 as shown in Fig. 1.

It will be seen that as the teeth 27 drill the opening in the ground, the core will pass upwardly through the opening in the member 26 into the passage 31 in the member 24 and then upwardly into the passage 32 in themember 23 and finally into the passage 33 in the tubular member 22.

The pipes 20'is provided for the 'relief of the pressure in the core receiving barrel, the same communicating with the bore 18 in the member 12 which is provided with a laterally extending air relief passage 34.

It will be noted that the flutings 25 provided on the member 24 space the member 24 from the inner wall portion 35 of the fish-tail bit 14, openings 36 being left between said wall `rtion 35 and the memvber 24 due to said ribs or iutings. Said passages communicate with the passage 37 provided between the coupling 23 and the upper screwthreaded end portion of the blt 14,- which in turn communicates with the passage 38 between the core barrel 22 and the casing 13, said passage being provided due tothe spacing ribs 31 provided on the Thus the head 21 has a luted outer face similar to the outer face of the member 24 providing passages 40 between the body portion of lthe head and the mem ber 13. 1

In order to provide a tight jointbetween the member 21 and the pipe 20 the rings of packing material 41 and 42 are provided on opposite sides of the washer 43, said rings `of packing material being seated in suitable grooves provided respectively in the member 21 and the clamping'nut 44 which serves to clamp the packing and the washer.

in position to provide a fluidtight joint between said ipe 20 and said head 21. A plurality of iagonally extending openings 45 is provided in the luted member 24 so that some of themud laden fluid will seep into the opening 31 to lubricate the walls thereof so as to more readily cause the core to'pass upwardly thereon in said passage 31.

It will be seen from the above that a device is provided Which has an inner core drilling bit and an outer rotary bit between wh1ch a passage is providedthat leads into the drill stem, through which the mud laden fluid is forced to the bottom of the hole that passes into the core receiving barrel. Due

to this construction all excess mud will pass upwardly around the drill stem without sealing the walls at the bottom of the opening and preventing the mixture thereof with y the core to such an extent as to make the core an inaccurate indication of the structure of the ground through which the hole is being drilled. Thus a core is obtained which is an accurate indication of the structure of the ground from which the `same is taken. l v v l,

Referring to Figs. 5, 6 and 7, the member 24 is provided with a bored out extension 50 which is threadedl on the end thereof to receive the member 26 carrying the rotary drill 27 in the same manner as 1n the forms shown in Figs. 1 to 4 inclusive. Mounted in the bore of the member 50 is a core lifter comprising the casing 51 havin bers 52 pivoted thereto at 53, said members 52 being adapted to seat in recesses in the walls of the members 51 and being adapted `to assume the position shown in Fig. 6 within said recesses when the core passes by the same. Each of the members 52 has a plate 54 mounted thereon, 'said plates 54 be' ing so shaped that when the same are in the memthe position shown in Fig. l5 they will close A52 is engaged by a s ring 56 which is secured t0 the outside o the casing 51 by any suitable means as bythe rivets 57, and which is adapted to move said members 52 and the plates 54 carried thereby into the closing position thereof. vIt will accordingly be seen that as the core passes upwardly past the members 54 thesame will be forced into the position shown in Fig. 6 movin the springs te the position shown in said ure in substantial parallelism'to the Aouter wall of the member 51. It will also be seen that after the core has passed the members 54 the same will move to the core holding p0- sition shown in Fig. 5. due to the action of the springs 56, thus holding the core from falling out.

Having thus described my invention, what I desire to claim and secure by U. S. Letters Patent is:

1. A device of the character described, comprising a drill stem, an inner rotary bit, and an outer rotary fish tail bit thereon, said, bits being spaced to provide a fluid passage between said bits, said passage havin its mouth adjacent the cutting edge of sai fish tail bit.

2. A device of the character described, comprising a drill stem, an inner rotary core drilling bit, and an outer rotary fis tail bit thereon, said bits being spaced to provide a fluid passage between said bits, said passage having its mouth above said inner bit.

3. A device of the character described, comprising a drill stem, an inner core drilling bit thereon, an outer rotary fish tail bit s aced therefrom to provide a fluid passage t erebetween, and a core receiving barrel in alignment with said core drilling bit, said passage havin f a mouth above said core drilling bit and a jacent the cutting edges of said fish tail bit.

4. A device of the character described, comprising a drill stem, an outer casing member secured thereto, a rotary fish tail bit secured thereto, an inner core receiving casing mounted therein and a drill secured to said inner casing, said device being provided with a passageway between said cas ings, said passageway providing openings leadin to the cutting ed es of said fish tail bit and having means de ecting a stream of fluid across said bit.

5. A device of the character described, comprising a drill steman outer casing member secured thereto, a rotary fish taii bit secured thereto, an inner core receiving casing, mounted therein and a drill secured to said inner casing, said device being provided with a passageway between said case7 ings, said inner casing having openings therein leading to said passageway and grooves extending adjacent the cutting edges of said fish tail bit to direct water against said cutting edges.

6. A device of the character described, comprising a drill stem, a core drilling bit, a core receiving member and a core lifter, said core lifter comprising a plurality of hinged members adapted to completely close the lower end of said core receiving member.

7. A device of the character described, comprising a drill stem, a core drillin bit, a core receiving member and a core 1fter, said core lifter comprising a plurality of hinged members adapted to completely close the lower end of said core receiving member and having recesses for receiving said members to permit passing of said core into said core receiving member.

8. A device of the character described, comprising a drill stem, a core drilling bit, a core receiving member and a core lifter, said core lifter comprising a plurality of members adapted to completely close the lower end of said core receiving member, and resilient means for moving said members toward closin position.

9. In a device o the character described comprising a drill stem, a core drillin bit, a core receiving member and a. core lifter, said core lifter comprising a plurality 0f members each a portion of a cone, movable into engagement to completely close the lower end of said core receiving member and resilient means for moving said members toward engaging position.

In witness whereof, I hereunto subscribe my name this twenty-fourth day of July A. D., 1922` OLOF B. ANDERSON. 

